Epson AcuLaser C1900 Reference Manual page 302

If a paper jam occurs at two or more locations simultaneously, the
corresponding multiple locations are displayed.
Jam A
Jam B
Jam C
Jam DM
Manual Feed xxx
The manual feed mode is specified for the current print job. Make
sure the paper size indicated by xxx is loaded, then press the
Start/Stop button
If you do not want to print this job in manual mode, press the
Cancel Job
paper source.
For details on the manual feed mode, see "Manually feeding
paper".
Mem Overflow
The printer has insufficient memory to execute the current task.
Press the
Start/Stop button
printing. Or press the
302
Troubleshooting
Paper is jammed at the MP tray. For instructions on how to remove
jammed paper at the MP tray, see "Jam A (Cover AB)" on page 268.
Paper is jammed inside the output path cover (cover AB) or fuser
unit. For instructions on how to remove jammed paper at the output
path cover or fuser unit, see "Jam B (Cover AB)" on page 271.
Paper is jammed inside the optional lower cassette (Cover C). For
instructions on how to remove jammed paper in the optional lower
cassette, see "Jam C (Cover C)" on page 278.
Paper is jammed inside the optional Duplex Unit's paper path or
cover (cover DM). For instructions on how to remove jammed paper
at the Duplex Unit, see "Jam DM (Cover DM)" on page 280.
.
. The printer feeds paper from the specified
button
Cancel Job button to cancel the print job.
on the control panel to resume